wiring question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

70inbville · 03-12-2013, 08:41 AM

Is the factory wiring harness from a complete pull out long enough to reach inside the cab for mounting. I don't really want all of that "stuff" under to hood. I am trying not to spend 1000.00 on a painless harness if I can help it!

Wasted Income · 03-12-2013, 10:33 AM

The factory harness puts the ECM up front on the driver side. As it comes out of the donor truck, there is no way it will reach the cab. If you pull the entire harness apart, you might be able to reroute everything and reach that far...but that is a lot of work.

I personally had my ECM mounted in a nice covered bracket up on the core support. You didn't really notice it unless you were looking for it.

mrhurt73 · 03-12-2013, 02:42 PM

i used a factory harness, and unwrapped everything and the items that would not reach were things on the drivers side of the motor, injectors, coil pack, temp sender

those things had to have wire soldered in.

was labor intensive though, not fast by any means. maybe my next one would be faster.

BR3W CITY · 03-12-2013, 06:07 PM

This depends on WHICH harness you started with. The VAN harness is longer in every way, by a decent amount, and will let you move things around easier, plus the length makes splicing easier if you need to.

thotfulspot · 03-12-2013, 06:53 PM

It's not a cheap option, but Painful Wiring has an option for their harnesses to mount inside. Anybody that makes or modifies harnesses should be able to do the same thing.
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Crash_OK · 03-12-2013, 07:02 PM

2005 truck harness worked for me..

70inbville · 03-12-2013, 07:13 PM

Thanks for the info, I am a LOOONG way off just trying to do my research now!

jorgensensc · 03-12-2013, 08:42 PM

Harness from PSI mounts it inside. Not 1000.00 and brand new quality connectors. They build the whole harness from scratch. I've heard it is a real quality piece. I'm waiting on mine to show up. Should be in the next couple of days.
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70inbville · 03-13-2013, 10:58 AM

thanks for the PSI link, just what I need it looks like.

Crash, I subscribed to your build looks great!

jorgensensc · 03-13-2013, 01:37 PM

They are great people to work with. They have great reviews all over the net, and was actually recommended to me by Brent at Dirty Dingo. Brent also builds cars for a living too. PSI took extra time to find out some info for me regarding fuel pumps and answered a bunch of questions for me weeks before I ordered. Then they tweaked the design of my harness for me as I needed it. I can't wait to get it and check it out!!
Shawn
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03-12-2013, 08:41 AM	#1
70inbville Registered User Join Date: Oct 2011 Location: bartlesville ok Posts: 143	wiring question Is the factory wiring harness from a complete pull out long enough to reach inside the cab for mounting. I don't really want all of that "stuff" under to hood. I am trying not to spend 1000.00 on a painless harness if I can help it!

03-12-2013, 10:33 AM	#2
Wasted Income Boosted Member Join Date: May 2002 Location: Mackinaw, IL Posts: 2,200	Re: wiring question The factory harness puts the ECM up front on the driver side. As it comes out of the donor truck, there is no way it will reach the cab. If you pull the entire harness apart, you might be able to reroute everything and reach that far...but that is a lot of work. I personally had my ECM mounted in a nice covered bracket up on the core support. You didn't really notice it unless you were looking for it. __________________ 1972 2wd K/5 Blazer Turbocharged 370 LSx - 941 rwhp / 1093 rwtq 1969 Chevy K-10 L33 5.3 / 4L80E / NP241 / 4" lift 1964 Buick Skylark Twin TURBO 383 LS pro-touring project 2014 VW Passat TDI - Daily Driver Turbo diesel 2015 Sierra Denali HD Duramax Turbo diesel 2023 Ford Explorer ST - Twin Turbskis 2023 Ford F150 RCSB - Whipple Supercharged 2017 Polaris RZR Turbo 2014 Nor-Tech Center Console - Twin Supercharged Outboards *TURBO ALL THE THINGS!!*

03-12-2013, 02:42 PM	#3
mrhurt73 Registered User Join Date: Aug 2012 Location: clifton forge, va Posts: 261	Re: wiring question i used a factory harness, and unwrapped everything and the items that would not reach were things on the drivers side of the motor, injectors, coil pack, temp sender those things had to have wire soldered in. was labor intensive though, not fast by any means. maybe my next one would be faster. __________________ My Projects- http://67-72chevytrucks.com/vboard/s...d.php?t=557301 Quest for Hot Rod Power Tour 2013. http://67-72chevytrucks.com/vboard/s...d.php?t=543735 my 85 GMC 2wd to 4wd conversion for the wife.

03-12-2013, 06:07 PM	#4
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: wiring question This depends on WHICH harness you started with. The VAN harness is longer in every way, by a decent amount, and will let you move things around easier, plus the length makes splicing easier if you need to. __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

03-12-2013, 06:53 PM	#5
thotfulspot Registered User Join Date: Jan 2013 Location: Madison, WI Posts: 198	Re: wiring question It's not a cheap option, but Painful Wiring has an option for their harnesses to mount inside. Anybody that makes or modifies harnesses should be able to do the same thing. Posted via Mobile Device

03-12-2013, 07:02 PM	#6
Crash_OK Registered User Join Date: Nov 2011 Location: Edmond, OK. Posts: 1,362	Re: wiring question 2005 truck harness worked for me.. __________________ Mark ----------------------- Crash's 69 4x4 SWB Crash's Roof over Lake Home Crash's 1988 Land Cruiser Build

03-12-2013, 07:13 PM	#7
70inbville Registered User Join Date: Oct 2011 Location: bartlesville ok Posts: 143	Re: wiring question Thanks for the info, I am a LOOONG way off just trying to do my research now!

03-12-2013, 08:42 PM	#8
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	Re: wiring question Harness from PSI mounts it inside. Not 1000.00 and brand new quality connectors. They build the whole harness from scratch. I've heard it is a real quality piece. I'm waiting on mine to show up. Should be in the next couple of days. Posted via Mobile Device __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE

03-13-2013, 10:58 AM	#9
70inbville Registered User Join Date: Oct 2011 Location: bartlesville ok Posts: 143	Re: wiring question thanks for the PSI link, just what I need it looks like. Crash, I subscribed to your build looks great!

03-13-2013, 01:37 PM	#10
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	Re: wiring question They are great people to work with. They have great reviews all over the net, and was actually recommended to me by Brent at Dirty Dingo. Brent also builds cars for a living too. PSI took extra time to find out some info for me regarding fuel pumps and answered a bunch of questions for me weeks before I ordered. Then they tweaked the design of my harness for me as I needed it. I can't wait to get it and check it out!! Shawn Posted via Mobile Device __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE



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